Slides explaining Boundary Scan test principles - goJTAG
Slides explaining Boundary Scan test principles - goJTAG
Slides explaining Boundary Scan test principles - goJTAG
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The Modified Counting Sequence<br />
001<br />
010<br />
011<br />
Open<br />
Assume stuck-at-0<br />
Short<br />
Assume wired AND<br />
000<br />
010<br />
010<br />
Some of the<br />
observed error<br />
responses are<br />
allowed or<br />
correct codes.<br />
How to improve<br />
the diagnosis?<br />
100<br />
100<br />
All 0-s 0 s and all 1-s 1 s are forbidden STV codes because of open<br />
faults. Therefore the final <strong>test</strong> length is ⎡log<br />
2<br />
(N+2)⎤<br />
This method was proposed in 1982 by Goel & McMahon<br />
18
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